Color

#2a09e1

#2a09e1
hex#2a09e1
rgbrgb(42, 9, 225)
hslhsl(249, 92%, 46%)
oklchoklch(0.427 0.275 270.2)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.0612

Colors that go with #2a09e1

Charcoal, Cobalt Blue and Cornflower Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#c1e109

#0955e1 · #9609e1

#e12a09 · #09e12a

Split-complementary

Open in tool →

#e19609 · #55e109

#e10955 · #c1e109 · #09e196

Contrast

#2a09e1 as textRatioAAAA largeAAAFix
Aaon white
9.44:1passpasspassPasses AAA — no fix needed.
Aaon black
2.22:1failfailfail
  • AA: use #755df8 as the text (4.68:1)
  • AAA: use #9685fa as the text (7.03:1)
  • AA: or shift the background to #b3b3b3 (4.5:1)
  • AAA: or shift the background to #dedede (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2a09e1 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#2a09e1 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2a09e1
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #2a09e1 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2a09e1-a79cc4-dfae4e-271f2d-e9ecf1?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md